zephermine

zephermine is a skill for Claude Code, Codex from Dannykkh/skill-olympus. It costs 97 tokens per session (10,235 once invoked), scanned A, original, MIT.

A structured planning workflow that researches a feature or product, gathers requirements, designs its data and interfaces, and saves detailed planning documents for later implementation and testing.

In plain words
What is it for?
Use it for feature or product design, including requirements, user flows, database and API plans, and test scenarios.
Why use it?
It turns an incomplete idea into written specifications that other development and quality-checking steps can use.

Skill for Claude CodeCodex

Written for Claude Code and Codex: shipped in a Claude Code plugin, but also agents/openai.yaml present. Also seen: reads .claude/ paths; mentions Codex.

Part of the skill-olympus plugin — 98 skills, 7 commands, 42 agents, 5 MCP servers shipped together

Good fit Use it for feature or product design, including requirements, user flows, database and API plans, and test scenarios.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/dannykkh/skill-olympus/zephermine
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add Dannykkh/skill-olympus --skill zephermine
Clone the repo
git clone --depth 1 https://github.com/Dannykkh/skill-olympus

Made for: Claude Code, Codex.

Or install skill-olympus, the plugin that ships this one along with the rest of its 98 skills, 7 commands, 42 agents, 5 MCP servers.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for zephermine

README.md
[![agentmods](https://agentmods.dev/badge/skills/dannykkh/skill-olympus/zephermine/github.svg)](https://agentmods.dev/skills/dannykkh/skill-olympus/zephermine)
Your own site
<a href="https://agentmods.dev/skills/dannykkh/skill-olympus/zephermine"><img src="https://agentmods.dev/badge/skills/dannykkh/skill-olympus/zephermine/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for zephermine

Your own site · 80×15
<a href="https://agentmods.dev/skills/dannykkh/skill-olympus/zephermine"><img src="https://agentmods.dev/badge/skills/dannykkh/skill-olympus/zephermine.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 97 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 10,235 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 2 findings, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • medium MCP Rug Pull · line 639
    npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.
    Fix: Pin the version: npx @scope/[email protected]
  • medium MCP Rug Pull · line 641
    npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.
    Fix: Pin the version: npx @scope/[email protected]
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00097 $0.10235
Opus 5 $0.00048 $0.05117
Sonnet 5 $0.00019 $0.02047
Haiku 4.5 $0.00010 $0.01023

Measured 2d ago against content hash c8831253edc9, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

zephermine scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/zephermine/SKILL.md · 684 lines

How it starts

The opening of the file, as written. The whole thing — 684 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Zephermine

Zephyr(제퍼: 산들바람/서풍, 부드럽고 빠른 흐름) + Minerva(미네르바: 지혜·전략·판단)의 합성어. 바람처럼 가볍고 빠르게 상황을 읽고, 미네르바처럼 논리적으로 설계해 실행 가능한 계획으로 만드는 능력을 뜻합니다. softaworks/gepetto 스킬을 벤치마킹하여 커스터마이징한 버전입니다.

Orchestrates a multi-step planning process: Research → Interview → Spec Synthesis → Team Analysis → Plan → External Review → Sections → Verify

네이티브 plan mode와의 구분: 현재 CLI가 제공하는 plan mode는 "이 작업을 어떻게 구현할까"를 다루는 단일 작업용 계획 승인 게이트이고, 젭마인은 다운스트림(포세이돈·아르고스·미노스·제우스·견적)이 소비하는 디스크 아티팩트(plan.md, sections/, flow-diagrams/, qa-scenarios)를 만드는 설계 파이프라인입니다. 단일 버그픽스·소규모 리팩토링은 plan mode, 기능/제품 단위 설계는 젭마인. Antigravity에서는 가벼운 구현 계획은 /plan, 누락 요구를 집중 인터뷰로 좁히는 일은 /grill-me가 먼저입니다. 그 결과만 필요하면 젭마인을 시작하지 않습니다. spec.md, 도메인 사전, API/DB, flow, sections, operation/QA 시나리오까지 디스크에 남겨 downstream이 소비해야 할 때만 젭마인을 사용합니다. slash command를 프로그램적으로 호출한다고 가정하지 않으며, 현재 plan mode가 쓰기·승인 전용이면 그 안에서 젭마인을 실행하지 않습니다. 사용자가 만든 네이티브 계획·인터뷰 결과는 쓰기 가능한 모드에서 입력으로 이어받습니다.

CRITICAL: First Actions

BEFORE anything else, do these in order:

1. Print Intro

간결하게 진행 순서만 출력:

젭마인(Zephermine) 시작
순서: Research → Blindspot → Interview → Spec(+Domain Dictionary v1) → Persona/Journey → Team Review(+Dictionary v3) → Plan → External Review → DB Schema → API Spec → Flow Diagrams → Sections → Operation Scenarios → QA Scenarios → Skill Discovery

2. Resolve Spec File Path

Check if user provided @file at invocation AND it's a spec file (ends with .md).

경로가 제공된 경우: 그대로 사용

경로가 없는 경우: 사용자 대화에서 주제를 추론하여 자동 경로 생성 후 바로 진행:

  1. 대화 컨텍스트에서 기능/프로젝트명 추출 (예: "UI 재설계" → ui-redesign)
  2. 기본 경로 패턴: docs/plan/{feature-name}/spec.md
  3. 사용자에게 경로만 간단히 확인:
    계획 경로: docs/plan/ui-redesign/spec.md
    이 경로로 진행합니다. (변경하려면 알려주세요)
    
  4. 확인을 기다리지 않고 바로 다음 단계 진행 (사용자가 변경 요청하면 그때 수정)

주제를 추론할 수 없는 경우에만 간단히 질문:

어떤 기능을 계획할까요? (예: "로그인 리팩토링", "결제 시스템")

3. Setup Planning Session

Determine session state by checking existing files:

Read the full file on GitHub · 684 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 684 lines · 97 tokens per session scan A c8831253edc9

Subscribe to this mod's changes

zephermine is a skill published in the GitHub repository Dannykkh/skill-olympus (5 stars, last pushed today), licensed MIT. It adds 97 tokens to every session and 10,235 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-06.